Loop-taker for sewing-machines



(No Model.) 2 Sheets-Sheet 1.

J. A. RUSSELL. LOOP 'TAKER FOR SEWING MACHINES.

.No. 472,512. 7 Patented Apr. 5, 1892.

(No Model.) 2 Sheets-Sheet 2.

v 'J. A. RUSSELL. LOOP TAKER FOR SEWING MACHINES.

1N0. 472,512. Patented Apr. 5, 1892.

WITNESSES: INVENTOR q aazmafimeza ATTOR N EY NITED STATES PATENT FFICE;

JOHN A. RUSSELL, OF CHICAGO, ILLINOIS.

LOOP-TAKER FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 472,512, dated April 5, 1892.

Application filed October 26, 1891. Serial No. 409.857. (No model.)

To all whom it may concern:

Be it known that I, JOHN A. RUSSELL, a citinen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Sewing-Machines; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as Will enable others skilled in the art to which it appertains to make and use the same.

My invention has reference to certain improvements in sewing-machines, but particularly does my invention relate to that class of such machines which employ a rotating or oscillating loop-taker.

The object of the present invention is to so equlp the machine that it will form what is termed a chain-stitch, it being immaterial whether an under thread is used or not.

In my improvement I accomplish the desired results without altering the structure or changing the function of a single detail, my newly-invented device being interchangeable with the usual bobbin-case.

In the accompanying drawings, Figure l is a perspective showing the relative positions of the spreader, loop, and needle when the latter has passed through the loop and is on the po1nt of entering the split; Fig. 2, a detail perspective of the loop-taker. Figs. 3 and 4 are detail perspectives of the spreader, taken at the front and rear, respectively; Fig. 5, a detail side elevation of the spreader; Fig. 6, a front elevation of the parts in relative position as shown at Fig. 1; Fig. 7, a front elevation showing the loop drawn from the spreader and the needle in position preparatory to the operation of the loop-taker within the succeeding loop. Fig. 8 is a front elevation illustrating the loop and the position of the parts as they appear immediately prior to the drawing of the loop around the neck of the spreader. Fig. 9 is a front elevation showing the loop drawn around the neck of the spreader preparatory to assuming the position shown at Figs. 1 and 6, and Figs. 10 and 11 show modifications of my invention. I

Similar numbers of reference indicate like parts in the several figures of the drawings.

1 is a loop-taker such as is used in the Wheeler & Wilson sewing-machine No. 9.

2 is a loop-spreader, whose neck 3 extends from a body at, which latter is preferably of such shape and contour as that it may be readily'interchanged with the usual bobbincasing. The end of the spreader is split, as seen at 5, to admit the needle, as will be presently set forth.

The neck 3 is contracted and the sides of the spreader are swelled, as seen at 6, with the two objects in vieW-namely, first, to open or spread the loop, and, second, to detain the loop until the needle 7 has passed through the same. The body4 is placed within the cavity of the loop-taker, and a shoulder 8 extends from said body between the walls of the gate of the loop-taker, so that it will be readily understood that the spreader and loop-taker will move in harmony. This shoulder, however, does not fit so tightly between said walls as to prevent the loop from freely drawing around the loop-taker onto the neck of the spreader.

Fig. 1 shows the relative positions of the spreader, loop, and needle when the latter has passed through the loop and is on the point of entering the split 5, and it will be clearly seen that the loop is momentarily detained by the swell 6, so as to be extended across and beneath the path of the needle, the result being that when the loop is spread by said swell the needle will pass through the loop, thereby forming the concatenation, and the loop will then be drawn from the spreader, as shown at Fig. 7.

The advantages of my improvement are of great importance, since the substitution of a loop-spreader in the place of a bobbin and casein a machine adapted to sewalock-stitch will readily change the character of such machine and equip it for sewing a single-thread chain-stitch. As hereinbefore stated, my improvement is interchangeable with the bobbin-case, and the time consumed in changing from a lock-stitch to a chain-stitch, or. vice versa, is but a few seconds.

It is not absolutely necessary that the sides of the spreader should be swelled, since the only function of the swell is to spread the loop and detain it until the needle passes through the same, and this may be effected by making the spreader of a diameter suffi- ICO eient to spread the loop and notching the under side of the spreader, as shown at 9, Fig. 10. Instead of the notch 9, a swell maybe formed, as shown at Fig. 11. In fact there are many ways, all within the scope of ordinary mechanical skill, whereby the spreader may be adapted to open and detain the loop, and I do not wish to be limited in this particnlar, although I prefer the construction having the swelled sides.

By the term loosely in my claimsI mean that the body of the spreader has no superficial connection whatever with the body of the loop-taker, so that the loop may draw entirely around the body of the spreader between the latter and the body of the looptaker.

I claim- In a sewing-machine of the character set forth, the combination, with the loop-taker, of the spreader comprising a bodyloosely placed within the cavity of the loop-taker and moving in harmony therewith and provided with a split extension having a contracted neck and swelled sides, the branches of said exten sion being of substantial col'lcentricity, as shown and described.

2. In a sewing-machine of the character described, the combination, with the looptaker, of an independent and separate loop-spreader moving in harmonytherewith and having" a split end to admit the needle and a swell or noteh to detain the loop, the branches of the said split end being of substantial concentricity, as set forth.

3. In a sewing-machine of the character described, the combination, with the loop-taker, of the independent and separate loop'spreader which has a shoulder fitting within the gate of the loop-taker and the spreader extending from said body and having a split end and swelled sides, the branches of said split end being of substantial concentricity, as set forth.

Intestimonywhereot I affix my signature in presence of two witnesses.

JOHN A. l-tUSSEI/L.

\Vitnesses:

If). F. FLANNERY, J. L. FLANNERY. 

